Island



, (No Model.) I

Patented Oct. 24, 1893.

I stock for hinge joints.

pin-tongues thereto.

Nrrn STATES PATENT OFFICE.

BARTON A. BALLOU, OF PROVIDENCE, RHODE ISLAND.

STOCK FOR HINGE-JOINTS OF PINS OR BROOCHES.

SPECIFICATION forming part of Letters Patent No. 507,254, dated October24, 1893.

Application filed February 9, 1893- Sorial No. 461,570. (No model.)

To all whom it may concern.-

Be it known that I, BARTON A. BALLOU, of the city and county ofProvidence, in the State of Rhode Island, have invented a certain newand useful Improvement in Stock for Hinge-Joints of Pins or Brooches;andI declare the following to be a specification thereof, referencebeing had to the accompanying drawings.

Like letters indicate like parts.

Figure l is a cross section of my improved Fig. 2 is a section of thesame on line a; m of Fig. 3. Fig. 3 is a front elevation of myinvention. Fig. 4is an inverted plan view of a breast pin having animproved pin-joint made of my improved stock. Fig. 5 is a side elevationof the same. Figs. 6 and 7 show a modified form of my invention.

My invention relates to stock for the manufacture of hinge joints ofbreast pins, brooches and similar articles for securing My improvedstock for this purpose consists of a metallic strip rolled out in theshape hereinafter specified and bent, and drawn so as to have a planebase and a tubular opening, the latter adapted to receive the pintle,which connects the hinge joint and pin-tongue. It has been usual,heretofore, in making hinge joints for such articles of jewelry, to usesections of hollow wire and solder them to the plate, but such jointsare very liable to be broken open or separated from the plate, as thepin-tongue exerts a powerful leverage, when used, and the resistance iscomparatively weak.

In my invention I use a metallic strip of stock of a peculiar shape,which shape is imparted by passing the strip between rollers, whosesurfaces are properly formed for the purpose. I show in Fig. 1 atransverse section of such a metallic strip after it has been subjectedto the rolling process. It has at each side the plane surfaces at b andc and a central portion at, integral therewith, of much less thicknessand slightly concavo-convexin cross section, as will be fully understoodfrom an examination of said figure. This strip is bent up, so as tobring the two surfaces at to- .gether and is then passed through adrawplate, the result of which operation is shown in Fig. 2, where it isseen that the two surfaces I) now form a continuous base, the twosurfaces at are in snug contact and central within the body and the thinportion dof the strip ,in bending and drawing has left a circularaperture 6, while the two surfaces 0 form the parallel sides or faces ofthe piece. The strip so formed is now divided transversely into sectionsof proper length, and two of these, (indicated as A in Figs. 4 and 5,)are soldered by their-bases b b to the back plate B of the breast pin orbrooch a sufficient distance apart to receive between them the bead ofthe pin-tongue. The pin-tongue G has the usual bead D, which is boredtransversely, and a pint-1e 2 passes through the tubular apertures e eof the joints A and through the bore of the pin-bead D, thus completingthe hinge. The pin-catch is shown at E.

Hinge joints made from my improved stock have great strength andrigidity. Each section has a broad plane base, thus giving a largesoldering surface and a firm resistance to the leverage caused by themovements of the pin, when the latter isinserted in or withdrawn from agarment. In burnishing the seam formed by the snug contact of thesurfaces aentirely disappears. V In case a greater degree of strength isdesired, the stock can be rolled as indicated in cross section in Fig.6, where the surface I) is seen extended bya lip or flange 0 on oneside. The stock, when bent and drawn up as shown in Fig. 7, gives anelongated base, the surfaces 19 I) being then continuous as there seen.

Instead of soldering the joint, shown in Fig. 7, by its base I) b to theplate of the breast pin B, as above stated, the joint may be soldered tosaid plate upon the side 0' thereof, in which case the lip or flange 0would be useful as a fulcrum to spring the pin tongue 0 into the catchE.

I claim as a novel and usefulinvention and desire to secure by LettersPatent 1. The improved stock for hinge joints herein described, made ofone piece of stock,having the plane surfaces at, b and c on each sideand a central thinner portion d, said stock being bent and drawn so asto form a hinge ture e and plane bases in one line, which joint having acontinuous base I) b, an inbases are adapted to be soldered to aplate B,

tGIiOl seam a and an aperture 6, substantially substantially asspecified. as specified. BARTON A. BALLOU.

5 2. The improved stock for hinge joints here- Witnesses:

in described, made of one piece of stook,hav- WARREN R. PEROE,

ing plane ends 12 b and bent to form an aper- DANIEL W. FINK.

